The Cap Type attribute shows the type of bulb base a fixture requires. This helps buyers know which bulbs are compatible, especially if bulbs are not included, and ensures sellers can clearly list the correct fitting type.
| Term | Description |
|---|---|
| B15 Small Bayonet Cap | Small bayonet fitting used in decorative lamps. |
| B22 Bayonet Cap | Common bayonet bulb fitting for general lighting. |
| E12 Candelabra Edison Screw | Small screw cap for chandeliers and decorative lights. |
| E14 Small Edison Screw | Widely used screw fitting in smaller lamps. |
| E17 Intermediate Edison Screw | Medium-sized screw base for compact fixtures. |
| E18 Edison Screw | Less common screw fitting variation. |
| E23 Edison Screw | Larger screw cap type for specific fittings. |
| E25 Edison Screw | Screw cap fitting variant. |
| E26 Standard Edison Screw | Standard US screw bulb base. |
| E27 Standard Edison Screw | Most common EU/UK screw fitting. |
| E37 Large Edison Screw | Extra-large screw base for industrial lamps. |
| G12 Ceramic Metal Halide Cap | Specialised cap for metal halide lamps. |
| G4 2-Pin Bi-Pin Cap | Tiny bi-pin fitting for compact lamps. |
| G9 Loop Bi-Pin Cap | Looped pin bulb cap for small fittings. |
| GU10 Twist Lock Cap | Common spotlight and downlight fitting. |
| GU5.3 MR16 2-Pin Cap | Low voltage 2-pin spotlight fitting. |
| Integrated LED | Fixture has built-in LED light source. |
